Dummy Head (A-9401-0072); Signal Amplitude Adjustment - Renishaw ATOM Installation Manual

Dummy head
(A-9401-0072)
The reuseable dummy head has the same dimensions as the ATOM readhead with
a longer 'nose' that is machined to the optimum rideheight (2.5 mm ±0.02 mm).
It is mounted in place of the readhead directly onto the bracket. The bracket should
have location pins or a shoulder to control readhead yaw. Contact your local
Renishaw representative for more information on bracket design.
1 Mount the dummy head onto the bracket using
2 off M2 x 6 screws.
2 Loosely mount the readhead bracket onto the axis.
3
Adjust the height of the bracket or disc assembly until
the 'nose' of the dummy head just touches the disc.
4 Tighten bracket fixing screws whilst ensuring good contact
between the 'nose' of the dummy head and the surface
of the scale.
5 Install the ATOM readhead in place of the dummy head using
2 off M2 x 6 screws in diagonally opposite fixing holes.
Using location pins/shoulder:
6 Ensure the readhead is pushed back against the location pins
or shoulder.
7 Tighten the fixing screws.
8
Check the readhead set-up LED is Green around the full axis
of rotation.
9 Proceed with 'System calibration' section.
Not using location pins:
10 Adjust longitudinal and radial offset of the readhead to obtain a Green readhead set-up LED around
the full axis of rotation. An oscilloscope or Renishaw USB set-up tool kit and software can be used to
help maximise the signal size. For more information on the Renishaw USB set-up tool kit contact your
local Renishaw representative.
11 Tighten the readhead fixing screws.
12 Proceed with 'System calibration' section.
ATOM
rotary installation guide

Signal amplitude adjustment

Mount the readhead directly onto a bracket, then, using the Renishaw USB set-up tool kit and software
or oscilloscope, adjust the readhead to maximise the signal size.
For more information on bracket design and the Renishaw USB set-up tool kit contact your local
Renishaw representative.
For more information on system tolerances refer to the installation drawings on www.renishaw.com
1 Mount the readhead onto the bracket using 2 off M2 x 6 screws.
2 Loosely mount the readhead bracket onto the axis.
3 Using the Renishaw USB set-up
tool kit or an oscilloscope adjust
the yaw, pitch and rideheight
of the readhead to maximise
the signal strength.
4 Tighten the bracket and readhead fixing screws.
5 Check the readhead set-up LED is Green around the full axis of rotation.
6 Proceed with 'System calibraton' section.
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